Structure, homogeneity ranges, magnetic, and electrical properties of the ordered Laves phases <i>RE</i>Ni<sub>4</sub>Mg with MgCu<sub>4</sub>Sn type structure
Language
en
Article de revue
This item was published in
Intermetallics. 2011, vol. 19, n° 10, p. 1579-1585
Elsevier
English Abstract
New ordered Laves phases <i>RE</i>Ni<sub>4</sub>Mg (<i>RE</i> = Sc, Sm, Tb-Lu) were synthesized from the elements in sealed tantalum ampoules in an induction furnace. Six of the structures were refined on the basis of X-ray ...Read more >
New ordered Laves phases <i>RE</i>Ni<sub>4</sub>Mg (<i>RE</i> = Sc, Sm, Tb-Lu) were synthesized from the elements in sealed tantalum ampoules in an induction furnace. Six of the structures were refined on the basis of X-ray single crystal data. The diffraction experiments gave hint for small homogeneity ranges <i>RE</i><sub>1+<i>x</i></sub>Ni<sub>4</sub>Mg<sub>1−<i>x</i></sub>. Magnetic susceptibility measurements show Curie-Weiss behavior for <i>RE</i> = Gd, Dy, Ho, Tm, Yb and the resulting effective magnetic moments suggest both stable trivalent states for all <i>RE</i> and a non-magnetic state for Ni. Gd<sub>1+<i>x</i></sub>Ni<sub>4</sub>Mg<sub>1−<i>x</i></sub> (<i>x</i> ≈ 0.12) orders antiferromagnetically at a Néel temperature of <i>T</i><sub>N</sub> = 4.6(5) K. Resistivity measurements reflect the metallic nature of these compounds.Read less <
English Keywords
Rare-earth intermetallics
Crystal chemistry of intermetallics
Single-crystal growth
Diffraction
Origin
Hal imported